org.globus.ogsa.impl.core.notification.framework.jms
Class JMSXSLQueryEvaluator

java.lang.Object
  org.globus.ogsa.impl.core.notification.framework.jms.JMSQueryEvaluator
      org.globus.ogsa.impl.core.notification.framework.jms.JMSXSLQueryEvaluator

All Implemented Interfaces:

QueryEvaluator, RegisterSubscriptionMessageReceiver, ServiceDataChangeMessageReceiver, UnregisterSubscriptionMessageReceiver

public class JMSXSLQueryEvaluator

extends JMSQueryEvaluator

The JMSServiceDataNameQueryEvaluator class This class is used to query the SubscriptionExpression defined by the SubscriptionExpressionType -- SubscribeByXSL

Field Summary

Fields inherited from class org.globus.ogsa.impl.core.notification.framework.jms.JMSQueryEvaluator

theSubscriptionCriteriaMap

Constructor Summary

JMSXSLQueryEvaluator(java.lang.String aSubscriptionExpressionType)
The constructor of the class.

Method Summary

boolean	evaluateCriteria(java.lang.String aCriteria, java.lang.String aSubscriptionID) The evaluateCriteria Method This mehtod evaluates to see if the message has to be sent to the sink
java.lang.String	getXSLQueryResults(java.lang.String aSubscriptionID, java.lang.String aTxtMsg)
static boolean	isDOMEmpty(javax.xml.transform.dom.DOMResult dom) The isDOMEmpty method.
void	receiveRegisterSubscriptionMessage(Message aMessage) The receiveRegisterSubscriotionMessage method.
void	receiveServiceDataChangeMessage(Message aMessage) The receiveServiceDataChangeMessage method.
void	receiveUnregisterSubscriptionMessage(Message aMessage) The receiveUnregisterSubscriptionMessage method.

Methods inherited from class org.globus.ogsa.impl.core.notification.framework.jms.JMSQueryEvaluator

formatNotifyMessage, getJMSAdapter, getSubscriptionInfo, publishNotifyMessage, publishRefreshServiceDataMessage, registerSubscription, unregisterSubscription

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JMSXSLQueryEvaluator

public JMSXSLQueryEvaluator(java.lang.String aSubscriptionExpressionType)
                     throws java.lang.Exception

The constructor of the class.

Parameters:

aSubscriptionExpressionType - - The expressionType used to create the query evaluator.

Throws:

java.lang.Exception - if the class can not be initialized.

Method Detail

evaluateCriteria

public boolean evaluateCriteria(java.lang.String aCriteria,
                                java.lang.String aSubscriptionID)

The evaluateCriteria Method This mehtod evaluates to see if the message has to be sent to the sink

Parameters:

aCriteria - - The subscription expression to be evaluated

aSubscriptionID - - The Subscription ID

Returns:

boolean --true, if message is to be sent to the sink --false, if message is not to be sent to the sink

receiveServiceDataChangeMessage

public void receiveServiceDataChangeMessage(Message aMessage)

The receiveServiceDataChangeMessage method. This method is executed when there is a servide data change notification

Specified by:

receiveServiceDataChangeMessage in interface ServiceDataChangeMessageReceiver

Specified by:

receiveServiceDataChangeMessage in class JMSQueryEvaluator

Parameters:

aMessage - - The service data change message.

receiveRegisterSubscriptionMessage

public void receiveRegisterSubscriptionMessage(Message aMessage)

The receiveRegisterSubscriotionMessage method. This method is executed when there is a message to the Register Subscription topic.

Specified by:

receiveRegisterSubscriptionMessage in interface RegisterSubscriptionMessageReceiver

Specified by:

receiveRegisterSubscriptionMessage in class JMSQueryEvaluator

Parameters:

aMessage - - The register subscription message.

receiveUnregisterSubscriptionMessage

public void receiveUnregisterSubscriptionMessage(Message aMessage)

The receiveUnregisterSubscriptionMessage method. This method is executed when there is a message to the Unregister Subscription topic.

Specified by:

receiveUnregisterSubscriptionMessage in interface UnregisterSubscriptionMessageReceiver

Specified by:

receiveUnregisterSubscriptionMessage in class JMSQueryEvaluator

Parameters:

aMessage - - The unregister subscription message.

getXSLQueryResults

public java.lang.String getXSLQueryResults(java.lang.String aSubscriptionID,
                                           java.lang.String aTxtMsg)
                                    throws javax.xml.transform.TransformerException,
                                           javax.xml.transform.TransformerConfigurationException,
                                           javax.xml.parsers.ParserConfigurationException,
                                           org.xml.sax.SAXException,
                                           java.lang.Exception

Parameters:

aSubscriptionID - - the subsription id.

aTxtMsg - - The message to be evaluated.

Returns:

String a formatted message based on the XSL criteria provided by the subcriber which may be published to the notify topic or null if message should not be published

Throws:

TranformerException

javax.xml.transform.TransformerConfigurationException

javax.xml.parsers.ParserConfigurationException

org.xml.sax.SAXException

java.lang.Exception

javax.xml.transform.TransformerException

isDOMEmpty

public static boolean isDOMEmpty(javax.xml.transform.dom.DOMResult dom)

The isDOMEmpty method. This method checks the given DOM object to see if it is empty.

Parameters:

dom - - The DOM structure

Returns:

true if contains no elements false otherwise